Here is the full list of all 50 Samurai Warriors: Chronicles 3 (EU) trophies - there are 40 bronze, 6 silver, 3 gold and 1 platinum.
Obtain a rare weapon.
Unlock 100% of all events in the Vault.
Unlock 50% of all events in the Vault.
Complete a stage on the "Nightmare" difficulty level.
Achieve maximum investment level for all areas in the castle town.
See the ending for "Battle at Ōsaka."
Claim victory in all Story Mode battles.
Obtain every horse.
Unlock panel 3.
Gain Favor of "Trusted" or higher with all officers.
See the ending for "Battle at Mt. Tachibana."
See the ending for "Conquest of Edo."
See the ending for "Ōsaka Castle Under Siege."
See the ending for "Battle of Setouchi II."
See the ending for "Defeat of Toyotomi II."
Complete over 50% of Story Mode objectives (as shown in the Vault).
See the ending for "The Defeat of Matsunaga."
See the ending for "Battle at Kawanakajima II."
Eat 500 rice balls.
Vanquish 1000 enemies using Hyper Attacks in a single battle.
See the ending for "Hisahide's Rebellion."
See the ending for "Ieyasu's Rebellion."
Use over 100,000 gold in the castle town.
See the ending for "Siege of Ōsaka Castle."
Use War Arts 10 times in a single battle.
Obtain a Death elemental weapon.
Unlock 50% of all music tracks in the Vault.
Receive a Challenge Mode reward for the first time.
Achieve a 1000-hit combo in a single battle.
Rack up 1000 K.O.s in a single battle.
Invest in something for the first time.
Claim victory in a battle.
Create a new character.
Obtain all trophies.
Use over 100,000 points earned from Challenge Mode.
Raise the level of any famous officer to max.
Obtain every single weapon in the game.
Attain a total K.O. count (as displayed in the Vault) of 100,000.
Unlock all panels.
Unlock panel 1.
Unlock panel 2.
Unlock panel 4.
Unlock panel 5.
Unlock panel 6.
Unlock panel 7.
Unlock panel 8.
Complete 100% of Story Mode objectives (as shown in the Vault).
Unlock 100% of all music tracks in the Vault.
Obtain every equipable item.
Learn every War Art.